我正在为我的一个帖子类型创建一个自定义提要，并允许用户设置该提要的名称。

http://www.mysite.com/feed/userdefinedname

现在，我还想让用户不仅可以显示该CPT中的所有帖子，还可以按类别过滤它们。目前情况是这样的：

http://www.mysite.com/feed/testcategory

然而，如果我能将其结构如下，我会非常喜欢它：

http://www.mysite.com/feed/userdefinedname/testcategory

这可能吗？

下面是生成这些基于类别的提要的代码：

 /**
 * Generate the feeds for categories
 *
 * @since 1.0
 */
function rss_c_add_category_feed( $in ) {

    $category = $GLOBALS[\'wp_rewrite\']->feeds[ count( $GLOBALS[\'wp_rewrite\']->feeds ) - 1 ];

    // Prepare the post query
    // Get published rss_feed posts with a rss_category slug in the taxonomy
    $rss_custom_feed_query = apply_filters(            
        \'rss_custom_feed_query\',
        array(
            \'post_type\'   => \'rss_feed\', 
            \'post_status\' => \'publish\',
            \'cache_results\' => false,   // disable caching
            \'tax_query\' => array(
                array(
                    \'taxonomy\' => \'rss_category\',
                    \'field\'    => \'slug\',
                    \'terms\'    => array( $category ),
                    \'operator\' => \'IN\'
                )
            )
        )
    );

    // Submit the query to get latest feed items
    query_posts( $rss_custom_feed_query );

    $sources = array();
    while ( have_posts() ) {
        the_post();
        $sources[] = get_the_ID();
    }


    // Create the query array
    $pre_query = array(
        \'post_type\'      => \'rss_feed_item\', 
        \'post_status\'    => \'publish\',
        \'cache_results\'  => false,   // disable caching
        \'meta_query\'     => array(
                                array(
                                    \'key\'     => \'rss_feed_id\',
                                    \'value\'   => $sources,
                                    \'compare\' => \'IN\'
                                )
        )
    );

    // Get options
    $options = get_option( \'rss_settings_general\' );
    if ( $options !== FALSE ) {
        // If options exist, get the limit
        $limit = $options[\'custom_feed_limit\'];
        if ( $limit !== FALSE ) {
            // if limit exists, set the query limit
            $pre_query[\'posts_per_page\'] = $limit;
        }
    }

    // query the posts
    query_posts( $pre_query );

    // Send content header and start ATOM output
    header(\'Content-Type: application/atom+xml\');
    // Disabling caching
    header(\'Cache-Control: no-cache, no-store, must-revalidate\'); // HTTP 1.1.
    header(\'Pragma: no-cache\'); // HTTP 1.0.
    header(\'Expires: 0\'); // Proxies.
    echo \'<?xml version="1.0" encoding="\' . get_option(\'blog_charset\') . \'"?\' . \'>\';
    ?>
    <feed xmlns="http://www.w3.org/2005/Atom">
        <title type="text">Latest imported feed items on <?php bloginfo_rss(\'name\'); ?></title>
        <?php
        // Start the Loop
        while ( have_posts() ) : the_post();

        ?>
        <entry>
            <title><![CDATA[<?php the_title_rss(); ?>]]></title>
            <link href="<?php the_permalink_rss(); ?>" />
            <published><?php echo get_post_time( \'Y-m-d\\TH:i:s\\Z\' ); ?></published>
            <content type="html"><![CDATA[<?php the_content(); ?>]]></content>
        </entry>
        <?php
        // End of the Loop
        endwhile;
        ?>
    </feed>
    <?php
}

add_rewrite_rule(
    \'^feed/(.+)/(.+)?/?$\',
    \'index.php?feed=$matches[1]&category_name=$matches[2]\',
    \'top\'
); // /feed/userdefinedname/testcategory